%0 Journal Article
%T Effect of pinhole diameter on correction accuracy of closed-loop adaptive optics system using self-referencing interferometer wavefront sensor<br>自参考干涉波前传感器中针孔直径对闭环自适应光学系统校正精度的影响
%A Bai Fu-Zhong
%A Rao Chang-Hui
%A <br>白福忠
%A 饶长辉
%J 物理学报
%D 2010
%I 
%X When the self-referencing interferometer wavefront sensor (SRIWFS) is applied to the absolute measurement of wavefront phase, the pinhole diameter should be less than half the Airy-disk diameter (dA) produced by an unaberrated optic so as to obtain a good approximation to a reference plane wave. In this way, however, the intensity transmission is also greatly reduced. To increase the intensity transmission as much as possible and improve the fringe contrast especially in the beginning of closed-loop correction, the maximal pinhole diameter allowed in the closed-loop correction with using SRIWFS is studied. Computer simulation and experiment demonstrate that a pinhole with not greater than 1.5dA can obtain a satisfied correction result and the Strehl ratio after correction is greater than 80%. Additionally, for a plane wavefront the intensity transmission will be increased from 63% to 90% as the pinhole diameter increases from 0.5dA to 1.5dA.
%K adaptive optics
%K self-referencing interferometer wavefront sensor
%K pinhole diameter
%K closed-loop correction<br>自适应光学
%K 自参考干涉波前传感器
%K 针孔直径
%K 闭环校正
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=9C75CE55CB00C78FF471F751AEDC3DF9&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=708DD6B15D2464E8&sid=7349DFC7B1AC456E&eid=8695D79AE8CA7CF3&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=20